Allanite and Apatite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.40-4.20
3.16-3.23
Fracture
Not Available
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
Cleavage
Not Available
[0001] indistinct, [1010] indistinct
Mohs Hardness
Not Available
5
Chemical Composition
Not Available
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Allanite and Apatite Chemical Formula
While comparing Allanite and Apatite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Allanite and Apatite chemical formula.
>- Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Allanite and Apatite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Allanite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Allanite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Allanite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.